Door frames and fire door equipment

Abstract

To provide a door frame in which screws and strength-improving frame materials are not exposed on the front or rear side of a door body when the door body is closed, and to provide a fire door facility in which the door body is attached to the door frame. [Solution] A door frame comprising a frame material 11 with a U-shaped cross section that is fixed to an opening D formed in a wall W, and a decorative cover 14 that covers the frame material 11, wherein the frame material 11 has a one-side flat portion 19 that is fixed to one side of the wall W by a screw 22, an inner side flat portion 20 that follows the inner surface I formed in the wall W by the opening D, and an other-side flat portion 21 that is fixed to the other side of the wall W by a screw 23, and the decorative cover 14 has a one-side region 35 that covers the one-side flat portion 19 and the screw 22, an inner side region 36 that covers the inner side flat portion 20, and an other side region 37 that covers the other-side flat portion 21 and the screw 23, and the decorative cover 14 is fixed by a screw 44 whose head is positioned opposite the door body 18 in the closed state and whose male thread portion is inserted into the inner side region 36 and the inner side flat portion 20.

Description

[Technical Field]

[0001] The present invention relates to a fire door system having a door frame and a door body attached to the door frame. [Background technology]

[0002] Fire doors, as defined by the Building Standards Act, tend to have heavier door bodies than regular doors in order to prevent the spread of fire, etc. Therefore, the door frames to which fire door bodies are attached generally require greater strength than door frames to which regular doors are attached. In this regard, Patent Document 1 discloses a door frame configured with a vertical frame having a U-shaped cross section (see Figures 3, 12, 13, etc. of Patent Document 1). The vertical frame having a U-shaped cross section can be used as a frame material to improve the strength of the door frame.

[0003] When fixing the vertical frame and other frame materials to the wall material by welding, it is necessary to do so in a way that the wall material does not become discolored or burned by the welding. In this regard, Patent Document 1 describes that the vertical frame is fixed to the opening with screws, so welding is not necessary.

[0004] On the other hand, when the frame material is fixed to the opening with multiple screws, some or all of the multiple screws are exposed on the front or back side (outdoor side, indoor side, etc.) of the door body even when the door body is closed. From the viewpoint of aesthetics, it is undesirable to expose screws in conspicuous positions, so treatments such as covering the screws with decorative covers are sometimes taken, such as that disclosed in Patent Document 2. Not only screws are covered with decorative covers, but frame materials are also often covered with decorative covers. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2024-132756 [Patent Document 2] Japanese Patent Application Publication No. 61-142281 Summary of the Invention [Problem to be solved by the invention]

[0006] However, if screws are used to fasten the decorative cover, the screws must also be prevented from being exposed on the front or rear side of the door body when the door body is closed. The present invention has been made in view of the above circumstances, and aims to provide a door frame in which the screws and strength-enhancing frame members are not exposed on the front or back side of the door body when the door body is closed, and a fire door system in which the door body is attached to the door frame. [Means for solving the problem]

[0007] The door frame of the first invention that meets the above-mentioned objective is a door frame comprising a frame material with a U-shaped cross section that is fixed to an opening for door installation formed in a wall, and a decorative cover that covers the frame material, and to which a door body is attached, wherein the frame material has one side flat portion that is fixed to one side of the wall by a screw P, an inner side flat portion that follows the inner surface formed in the wall by the opening, and an other side flat portion that is fixed to the other side of the wall by a screw Q, and the decorative cover has one side region that covers the one side flat portion together with the screw P, an inner side region that covers the inner side flat portion, and an other side region that covers the other side flat portion together with the screw Q, and the decorative cover is fixed by a screw R whose head is positioned opposite the door body in the closed state and whose male thread portion is inserted through the inner side region and the inner side flat portion.

[0008] A second invention that meets the above-mentioned objective is a fire door system comprising a door frame with a U-shaped cross section that is fixed to a door installation opening formed in a wall, and a decorative cover that covers the frame, and a door body that is attached to the door frame, wherein the frame has one flat side portion that is fixed to one side of the wall with a screw P, an inner flat side portion that follows the inner circumferential surface formed in the wall by the opening, and another flat side portion that is fixed to the other side of the wall with a screw Q, and the decorative cover has one side region that covers the one flat side portion together with the screw P, an inner region that covers the inner flat side portion, and another side region that covers the other flat side portion together with the screw Q, and the decorative cover is fixed by a screw R whose head is positioned opposite the door body in a closed state and whose male thread portion is inserted through the inner flat side region and the inner flat side portion. [Effects of the Invention]

[0009] In the door frame of the first invention, the frame material has one side flat portion fixed to one side of the wall by a screw P, an inner side flat portion along the inner surface created in the wall by an opening, and another side flat portion fixed to the other side of the wall by a screw Q, and the decorative cover has one side area that covers the one side flat portion together with the screw P, an inner side area that covers the inner side flat portion, and another side area that covers the other side flat portion together with the screw Q, and the decorative cover is fixed by a screw R whose head is positioned opposite the door body in the closed state and whose male thread portion is inserted through the inner side area and the inner side flat portion, so that it is possible to prevent the screw and the frame material for improving strength from being exposed on the front or back side of the door body when the door body is closed.

[0010] The fire door equipment according to the second aspect of the invention has the door frame according to the first aspect of the invention, so the screws and strength-enhancing frame material are not exposed on the front or back side of the door body when the door body is closed. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a front view of a fire door system according to an embodiment of the present invention. FIG. [Figure 2]An explanatory diagram showing the frame material attached to the opening in the wall. [Figure 3] FIG. 1 is a cross-sectional view of a fire door system with some parts omitted. [Figure 4] FIG. 1 is a partially omitted vertical cross-sectional view of a fire door system. [Figure 5] FIG. [Figure 6] FIG. 4 is an explanatory diagram of a first cover piece and a second cover piece. DETAILED DESCRIPTION OF THE INVENTION

[0012] Next, embodiments of the present invention will be described with reference to the accompanying drawings to facilitate understanding of the present invention. As shown in Figures 1 to 4, a fire door system 10 according to one embodiment of the present invention is a system comprising a door frame 17 having frame members 11, 12, and 13 with a U-shaped cross section that are fixed to a door installation opening D formed in a wall W, and decorative covers 14, 15, and 16 that cover the frame members 11, 12, and 13, respectively, and a door body 18 that is attached to the door frame 17. This will be described in detail below.

[0013] There are no particular limitations on the wall W, and for example, the wall W can be formed by a panel with rock wool sandwiched between metal plates, or by fixing a board to a lightweight steel framework. The wall W may divide an indoor space into two spaces, but in this embodiment, the wall W separates the indoors from the outdoors. Here, the outdoor side of the wall W is referred to as one side of the wall W, and the indoor side of the wall W is referred to as the other side of the wall W. As shown in Figures 1 and 2, the opening D has a rectangular shape that is elongated in the vertical direction, and the wall W has an inner surface I formed by the opening D (at the outer edge of the opening D) as shown in Figures 2, 3, and 4.

[0014] The frame members 11, 12, 13 and the decorative covers 14, 15, 16 are all long. When looking at the fire door system 10 and wall W from outside (hereinafter, unless otherwise specified, it is assumed that the view is from that direction), frame member 11 is arranged vertically on the left side of opening D and fixed to wall W, as shown in Figure 2. Frame member 12 is arranged horizontally above opening D and fixed to wall W, and frame member 13 is arranged vertically on the right side of opening D and fixed to wall W. Inner peripheral surface I is provided in the areas corresponding to the left linear portion, upper linear portion, and right linear portion of the outer edge of opening D, and is entirely covered by frame members 11, 12, 13.

[0015] As shown in Figures 2 and 3, frame material 11 and frame material 13 are basically the same in shape and length, and frame material 12 is basically the same in shape as frame material 11 and frame material 13 except that it is shorter than frame material 11 and frame material 13, as shown in Figures 2, 3 and 4. In this embodiment, frame materials 11, 12 and 13 are each formed by bending a long metal plate so as to have a U-shaped cross section.

[0016] As shown in Figures 3 and 5, the frame material 11 has a one-side flat surface 19 in contact with one side of the wall W, an inner peripheral side flat surface 20 along the left-hand region of the inner peripheral surface I (hereinafter, the "inner peripheral surface I" of the frame material 11 means the region to the left of the inner peripheral surface I), and an other-side flat surface 21 in contact with the other side of the wall W. The one-side flat surface 19, the inner peripheral side flat surface 20, and the other-side flat surface 21 extend over the entire length of the frame material 11. In this embodiment, the one-side flat surface 19 is in surface contact with one side of the wall W, the inner peripheral side flat surface 20 is in surface contact with the inner peripheral surface I, and the other-side flat surface 21 is in surface contact with the other side of the wall W.

[0017] 2 and 3, the one-side flat portion 19 is fixed to one surface of the wall W by a plurality of screws 22 (an example of the screws P) that pass through each one-side flat portion 19. As shown in FIG. 2, the plurality of screws 22 are provided at intervals along the longitudinal direction of the one-side flat portion 19 (frame material 11). 3, the other-side flat portion 21 is fixed to the other surface side of the wall W by a plurality of screws 23 (an example of screws Q) that respectively pass through the other-side flat portion 21. The plurality of screws 23 are provided at intervals along the longitudinal direction of the other-side flat portion 21 (frame material 11).

[0018] As shown in Figures 2 and 4, the frame material 12 also has a one-side flat portion 25 fixed to one side of the wall W by a plurality of screws 24 (an example of screws P), an inner side flat portion 26 along the inner surface I, and an other-side flat portion 28 fixed to the other side of the wall W by a plurality of screws 27 (an example of screws Q). As shown in Figures 2 and 3, the frame material 13 also has a one-side flat portion 30 fixed to one side of the wall W by a plurality of screws 29 (an example of screws P), an inner side flat portion 31 along the inner surface I, and an other-side flat portion 33 fixed to the other side of the wall W by a plurality of screws 32 (an example of screws Q).

[0019] 1 and 3, the decorative cover 14 and the decorative cover 16 are basically the same in shape and length, and the decorative cover 15 is basically the same in shape as the decorative cover 14 and the decorative cover 16, except that it is shorter than the decorative cover 14 and the decorative cover 16, as shown in FIGS. 1, 3 and 4. The decorative covers 14, 15 and 16 are each formed by bending a metal plate or the like.

[0020] 1 and 3, the decorative cover 14 has a one-side region 35 that covers the entire one-side flat surface portion 19, an inner peripheral side region 36 that covers the entire inner peripheral side flat surface portion 20, and an other-side region 37 that covers the entire other-side flat surface portion 21. As shown in Fig. 3, the one-side region 35 and the other-side region 37 each have a U-shaped cross section. Note that the cross section refers to a cross section perpendicular to the longitudinal direction of the decorative cover 14, and this also applies to the decorative covers 15 and 16.

[0021] One side area 35 is exposed to the outdoors and covers all of the screws 22 without contacting each of the screws 22. The other side area 37 is exposed to the indoors and covers all of the screws 23 without contacting each of the screws 23.

[0022] The inner peripheral region 36 is provided with, in order from one side end portion continuous with the one side region 35 to the other side end portion continuous with the other side region 37, a flat portion 38 parallel to the left side region of the inner peripheral surface I (hereinafter, the "inner peripheral surface I" of the decorative cover 14 means the left side region of the inner peripheral surface I), a door stopper 39 protruding toward the inside of the opening D, and a flat portion 40 parallel to the inner peripheral surface I. Thus, the door stopper 39 is formed in the inner peripheral region 36. The door stopper 39 supports the door body 18, and when the door body 18 is closed after being opened, it positions the door body 18 at a position where it is in the closed state.

[0023] Here, as shown in Figure 6, the decorative cover 14 has a first cover piece 41 that constitutes the entire one side region 35 and part of the inner side region 36, and a second cover piece 42 that constitutes the entire other side region 37 and part of the inner side region 36 that is not included in the first cover piece 41. In this embodiment, the first cover piece 41 is formed by bending a single metal plate, and constitutes part of the flat portion 38 and part of the door stopper 39. The second cover piece 42 is formed by welding two members, each formed by bending a single metal plate, together. The second cover piece 42 constitutes part of the flat portion 38, most of the door stopper 39, and the entire flat portion 40. Note that the second cover piece 42 does not have to be formed from two members, and can be formed, for example, from a single member.

[0024] In this embodiment, the frame material 11 and the decorative cover 14 are fixed to the wall W through the following steps.

[0025] (1) The frame material 11 is placed at the installation position as shown in Fig. 3. The installation position is a position of the frame material 11 where the inner peripheral flat surface 20 contacts the left region of the inner peripheral surface I provided on the wall W, and the one-side flat surface 19 and the other-side flat surface 21 contact one side and the other side of the wall W, respectively.

[0026] (2) The frame material 11 is fixed to the wall W using a plurality of screws 22 and a plurality of screws 23.

[0027] (3) The first cover piece 41 and the second cover piece 42 are arranged in their respective installation positions (i.e., the first cover piece 41 covers the one side flat surface portion 19 and the screw 22, the second cover piece 42 covers the other side flat surface portion 21 and the screw 23, and the first cover piece 41 and the second cover piece 42 are arranged to cover the inner side flat surface portion 20).

[0028] (4) The first cover piece 41 and the second cover piece 42 are connected with a screw 43 (an example of the screw S) to form the decorative cover 14. Therefore, the decorative cover 14 has the first cover piece 41 and the second cover piece 42 connected with the screw 43.

[0029] (5) The decorative cover 14 is fixed to the wall W with a screw 44 (an example of the screw R) that passes through the inner peripheral region 36 (in this embodiment, the flat portion 38) of the decorative cover 14 and the inner peripheral flat portion 20 of the frame material 11. The head of the screw 44 is positioned opposite the left end of the door body 18 in the closed state, and the male thread passes through the inner peripheral region 36 and the inner peripheral flat portion 20, with the tip inserted into the wall W, thereby fixing the decorative cover 14 to the wall W.

[0030] With the decorative cover 14 fixed to the wall W, the male threads of the screws 43 pass through the portion of the first cover piece 41 that constitutes the door stop 39 and the portion of the second cover piece 42 that constitutes the door stop 39, and are fixed to the door stop 39. The heads of the screws 43 are exposed from the door stop 39 (decorative cover 14) and are positioned opposite the door body 18 in the closed state. In this embodiment, a door stop member 45 that covers the head of the screw 43 is attached to the door stopper 39. In this embodiment, a plate-shaped rubber material that is attached to the door stopper 39 is used as the door stop member 45.

[0031] As shown in Figure 4, the decorative cover 15, like the decorative cover 14, has one side region 46 with a U-shaped cross section that covers the entire one side flat surface portion 25 and all of the screws 24, an inner side region 47 that covers the entire inner side flat surface portion 26, and another side region 48 with a U-shaped cross section that covers the entire other side flat surface portion 28 and all of the screws 27.

[0032] The inner peripheral region 47 is provided with, in this order from one side region 46 to the other side region 48, a flat portion 49 parallel to the upper region of the inner peripheral surface I (hereinafter, the "inner peripheral surface I" of the decorative cover 15 means the upper region of the inner peripheral surface I), a door stopper 50 protruding toward the inside of the opening D, and a flat portion 51 parallel to the inner peripheral surface I. The door stopper 50 supports the door body 18 in the closed state.

[0033] The decorative cover 15 includes a first cover piece 53 that constitutes the entire one side region 46 and a part of the inner peripheral region 47, and a second cover piece 54 that constitutes the entire other side region 48 and a part of the inner peripheral region 47 that is not included in the first cover piece 53. The first cover piece 53 and the second cover piece 54 are connected by a screw 55 (an example of a screw S) whose male thread portion is fixed to the door stopper 50 and whose head is exposed from the door stopper 50 (decorative cover 15).

[0034] The head of the screw 55 is disposed in a position facing the door body 18 in the closed state. A door stopper member 56 that covers the head of the screw 55 is attached to the door stopper 50. The decorative cover 15 is fixed to the wall W by a plurality of screws 57 (an example of a screw R), each of which has a head positioned opposite the door body 18 in the closed state, and whose male threaded portion passes through the inner peripheral region 47 and the inner peripheral flat portion 26 and whose tip is inserted into the wall W.

[0035] As shown in Figure 3, the decorative cover 16 also has a one-side region 58 with a U-shaped cross section that covers the entire one-side flat surface portion 30 and all of the screws 29, an inner side region 59 that covers the entire inner side flat surface portion 31, and an other-side region 60 with a U-shaped cross section that covers the entire other-side flat surface portion 33 and all of the screws 32.

[0036] The inner peripheral region 59 is provided with, in order from the one side region 58 side to the other side region 60, a flat portion 61 parallel to the right side region of the inner peripheral surface I (hereinafter, the "inner peripheral surface I" of the decorative cover 16 means the right side region of the inner peripheral surface I), a door stopper 62 protruding toward the inside of the opening D, and a flat portion 63 parallel to the inner peripheral surface I. The door stopper 62 supports the door body 18 in the closed state.

[0037] The decorative cover 16 includes a first cover piece 64 that constitutes the entire one side region 58 and a part of the inner peripheral region 59, and a second cover piece 65 that constitutes the entire other side region 60 and a part of the inner peripheral region 59 that is not included in the first cover piece 64. The first cover piece 64 and the second cover piece 65 are connected by a screw 66 (an example of a screw S) whose male thread portion is fixed to the door stopper 62 and whose head is exposed from the door stopper 62 (decorative cover 16).

[0038] The head of the screw 66 is disposed in a position facing the door body 18 in the closed state. A door stopper 67 that covers the head of the screw 66 is attached to the door stopper 62. The decorative cover 16 is fixed to the wall W by a screw (an example of a screw R) not shown, whose head is positioned opposite the door body 18 in the closed state, and whose male threaded portion passes through the inner peripheral region 59 and the inner peripheral flat portion 31 and whose tip is inserted into the wall W.

[0039] The method of fixing the frame material 12 and the decorative cover 15 to the wall W, and the method of fixing the frame material 13 and the decorative cover 16 to the wall W are the same as the method of fixing the frame material 11 and the decorative cover 14 to the wall W, so detailed explanations will be omitted here.

[0040] 1 and 3, a plurality of hinges 68 are attached to the door body 18 and spaced apart in the vertical direction. Each hinge 68 is fixed to the decorative cover 16 and the frame material 13 by a plurality of screws 69, allowing the door body 18 to rotate around the hinge 68. As shown in FIG. 4, a door stopper 70 fixed to the floor or the ground is provided below the opening D.

[0041] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and all changes in conditions that do not depart from the gist of the present invention are within the scope of application of the present invention. For example, a door frame does not have to have three frame members with a U-shaped cross section and three decorative covers that cover the frame members. It is also possible for the door frame to have two frame members with a U-shaped cross section and one frame member that does not have a U-shaped cross section (in which case there are two decorative covers that cover the U-shaped frame members), or for the door frame to have one frame member with a U-shaped cross section and two frame members that do not have a U-shaped cross section (in which case there is one decorative cover that covers the U-shaped frame members).

[0042] Furthermore, the first cover piece and the second cover piece may not be connected by screws, but may be connected by other members or configurations (such as a configuration in which the first cover piece is fixed to the second cover piece by crimping). The decorative cover does not need to include a first cover piece and a second cover piece, and may be configured from a single member. Furthermore, the decorative cover may include members other than the first cover piece and the second cover piece.

[0043] It is not necessary to form a door stopper on the decorative cover. For example, a door stopper member may be prepared separately from the decorative cover and fixed to the decorative cover. The tip of the screw R does not need to be positioned inside the wall; for example, it is possible to design the tip of the screw R to remain inside the frame material (in this case, the decorative cover is fixed by the screw R to the frame material fixed to the wall). [Explanation of symbols]

[0044] 10: Fire door equipment, 11, 12, 13: Frame material, 14, 15, 16: Decorative cover, 17: Door frame, 18: Door body, 19: One side flat portion, 20: Inner peripheral side flat portion, 21: Other side flat portion, 22, 23, 24: Screw, 25: One side flat portion, 26: Inner peripheral side flat portion, 27: Screw, 28: Other side flat portion, 29: Screw, 30: One side flat portion, 31: Inner peripheral side flat portion, 32: Screw, 33: Other side flat portion, 35: One side region, 36: Inner peripheral side region, 37: Other side region, 38: Flat portion, 39: Door stopper, 40: Flat portion, 41: First cover piece, 42: Second cover Pieces, 43, 44: screw, 45: door stop member, 46: one side region, 47: inner peripheral region, 48: other side region, 49: flat portion, 50: door stopper, 51: flat portion, 53: first cover piece, 54: second cover piece, 55: screw, 56: door stop member, 57: screw, 58: one side region, 59: inner peripheral region, 60: other side region, 61: flat portion, 62: door stopper, 63: flat portion, 64: first cover piece, 65: second cover piece, 66: screw, 67: door stop member, 68: hinge, 69: screw, 70: door stopper, D: opening, I: inner peripheral surface, W: wall

Claims

1. A door frame includes a U-shaped cross-section frame material that is fixed to an opening for door installation formed in a wall, and a decorative cover that covers the frame material, and to which a door body is attached. The frame material includes a one-side flat portion fixed to one side of the wall by a screw P, an inner peripheral side flat portion along an inner peripheral surface provided in the wall by the opening, and an other-side flat portion fixed to the other side of the wall by a screw Q, The decorative cover has one side region covering the one side flat surface portion together with the screw P, an inner peripheral side region covering the inner peripheral side flat surface portion, and another side region covering the other side flat surface portion together with the screw Q, and is provided with a first cover piece constituting the entire one side region and a part of the inner peripheral side region, and a second cover piece constituting the entire other side region and a part of the inner peripheral side region that is not included in the first cover piece, The decorative cover is fixed by a screw R, the head of which is arranged in a position facing the door body in the closed state, and the male thread portion of which is inserted through the inner peripheral region and the inner peripheral flat portion, A door stopper is formed in the inner peripheral region, protruding toward the inside of the opening and supporting the door body in a closed state, The door frame is characterized in that the first cover piece and the second cover piece are connected by a screw S whose male threaded portion is fixed to the door stopper and whose head is exposed from the decorative cover, and the head of the screw S is positioned in a position facing the door body in the closed state.

2. A fire door system having a U-shaped cross-section frame member fixed to a door mounting opening formed in a wall, a door frame having a decorative cover covering the frame member, and a door body attached to the door frame, The frame material includes a one-side flat portion fixed to one side of the wall by a screw P, an inner peripheral side flat portion along an inner peripheral surface provided in the wall by the opening, and an other-side flat portion fixed to the other side of the wall by a screw Q, The decorative cover has one side region covering the one side flat surface portion together with the screw P, an inner peripheral side region covering the inner peripheral side flat surface portion, and another side region covering the other side flat surface portion together with the screw Q, and is provided with a first cover piece constituting the entire one side region and a part of the inner peripheral side region, and a second cover piece constituting the entire other side region and a part of the inner peripheral side region that is not included in the first cover piece, The decorative cover is fixed by a screw R, the head of which is arranged in a position facing the door body in the closed state, and the male thread portion of which is inserted through the inner peripheral region and the inner peripheral flat portion, A door stopper is formed in the inner peripheral region, protruding toward the inside of the opening and supporting the door body in a closed state, The first cover piece and the second cover piece are connected by a screw S whose male thread portion is fixed to the door stopper and whose head is exposed from the decorative cover, and the head of the screw S is positioned in a position facing the door body in the closed state.

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